On 6/3/21 7:04 PM, Andy Shevchenko wrote:
Sometimes it's useful to have well-defined SI metric prefix to be used
to self-describe the formulas or equations.
List most popular ones in the units.h.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
include/linux/units.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/include/linux/units.h b/include/linux/units.h
index dcc30a53fa93..7366fcd45ec2 100644
--- a/include/linux/units.h
+++ b/include/linux/units.h
@@ -4,6 +4,22 @@
#include <linux/math.h>
+/* Metric prefixes in accordance with Système international (d'unités) */
+#define PETA 1000000000000000LL
+#define TERA 1000000000000LL
+#define GIGA 1000000000L
+#define MEGA 1000000L
+#define KILO 1000L
+#define HECTO 100L
+#define DECA 10L
+#define DECI 10L
+#define CENTI 100L
+#define MILLI 1000L
+#define MICRO 1000000L
+#define NANO 1000000000L
+#define PICO 1000000000000LL
+#define FEMTO 1000000000000000LL
+
For me milli is always 1/1000. Might lead to confusion with these
defines if idea is to multiply with KILO but divide with MILLI?
Jarkko
